Operational Test of the Passenger Address (PA) system

TASK 23-73-00-710-005-A
Operational Test of the Passenger Address (PA) system

ZONE: 200

1. Reason for the Job
This procedure gives the instructions necessary to make sure that the PA system operates correctly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

C. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 35-23-00-710-001-A	Operational Check of Manual Mask Release

3. Job Set-up
Subtask 23-73-00-860-076-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Energize the Passenger Emergency-Oxygen System.
(Ref. AMM TASK 35-23-00-710-001).
(3) Make sure that the Cabin Intercommunication Data System (CIDS) is energized
(Ref. AMM TASK 23-73-00-861-001).
(4) Make sure that the INT/RAD switch on the Audio Control Panel (ACP) is in the center position.
(5) Make sure that the INTEG LT/ MAIN PNL & PED rotary knob on the pedestal panel 111VU is in the BRT position.
(6) Make sure that the cockpit door is open.
(7) On all emergency oxygen-containers, set the doorstop to the test position.

NOTE: The annunciation indication and the communication go off, if there is a delay of more than 60 sec. between the test procedure steps.

Subtask 23-73-00-865-055-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40

Subtask 23-73-00-865-265-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41

4. Procedure
Subtask 23-73-00-710-064-A ** ON A/C NOT FOR ALL

A. Do the test of the PA announcement from the cockpit

ACTION	RESULT
1.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
2.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
3.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
Push and hold the PTT switch and make an announcement.	You hear the announcement.
	On all Attendant Indication Panels (AIP):
	'DIRECT PA IN USE' comes on.
Release PTT switch.	'DIRECT PA IN USE' goes off.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Release the PA pushbutton switch.	The integral light of the PA pushbutton switch goes off.

5.In the cockpit:
Lift the handset from the cradle.
	On all AIPs:
Push and hold the PTT switch and make an announcement.	'DIRECT PA IN USE' comes on.

	In the cabin, in all lavatories and at all attendant stations:
	You hear the announcement.

	On all AIPs:
Release the PTT switch and put the handset back in the cradle.	'DIRECT PA IN USE' goes off.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
7.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob ccw.

Subtask 23-73-00-710-064-F ** ON A/C NOT FOR ALL

A. Test of the PA Announcement from the Cockpit

ACTION	RESULT
1.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
2.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
3.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
Push and hold the PTT switch and make an announcement.	You hear the announcement.

	On all Attendant Indication Panels (AIP):
	The message "PA ALL IN USE" comes on.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Release the PA pushbutton switch.	The integral light of the PA pushbutton switch goes off.

	On all AIPs:
	The message "'PA ALL IN USE" goes off.
5.In the cockpit:
Lift the handset from the cradle.
	On all AIPs:
Push and hold the PTT switch and make an announcement.	The message "PA ALL IN USE" comes on.

	In the cabin, in all lavatories and at all attendant stations:
	You hear the announcement.

	On all AIPs:
Release the PTT switch and put the handset back in the cradle.	The message "PA ALL IN USE" goes off.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
7.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob ccw.

Subtask 23-73-00-710-333-A ** ON A/C NOT FOR ALL

B. Test of the PA announcement from the cockpit

ACTION	RESULT
1.In the cockpit:
Open the cockpit door.
2.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
3.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.

	On all Attendant Indication Panels (AIPs):
	The message "DIRECT PA IN USE" comes on.
4.On the cockpit boomset:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.

5.On the audio control panel in the cockpit:	On all AIPs:
Push to release the PA pushbutton switch.	The message "DIRECT PA IN USE" goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On the audio control panel in the cockpit:
	The integral light of the PA pushbutton switch goes off.
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
6.In the cockpit:
Lift the handset from the cradle.
	On all AIPs:
Push and hold the PTT switch.	The message "DIRECT PA IN USE" comes on.
	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.
	On all AIPs:
Release the PTT switch.	The message "DIRECT PA IN USE" goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
7.In the cockpit:
Put the handset back into its cradle.
8.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-065-J ** ON A/C NOT FOR ALL

C. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary-knob fully cw.	the integral light of the PA rotary-knob comes on.
3.At the FWD ATTND Station:	In the handset:
lift the handset from the cradle.	a dial tone is heard.
	On the FWD AIP 320RH:
	the number symbol comes on.
4.On the handset:
push and hold the PTT and do an announcement.	the number symbol goes off,
	the message PA ALL comes on.
	On the AFT AIPs 320RH:
	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and the AFT ATTND Stations:
	the announcement is heard from the loudspeakers.
5.At the FWD ATTND Station:
release the PTT and put the handset back to the cradle.	All indications are cancelled.
6.At the FWD attendant station:	On the FWD AIP 320RH:
lift the handset from the cradle.	the number symbol comes on.
	In the handset:
	a tone is heard.
7.On the handset:
push the PA ALL pushbutton switch.	the tone stops.
	On the FWD AIP 320RH:
	the number symbol goes off.
	the PA ALL message comes on.
	On both AFT AIPs 320RH:
	the PA ALL IN USE message comes on.
	In the cabin, all lavatories and both AFT attendant stations:
push and hold the PTT pushbutton switch.
speak into the handset.	the announcement is heard from the loudspeakers.
	In the cockpit:
	the announcement is heard from the handset and the loudspeaker.
8.At the FWD attendant station:
put the handset back to the cradle.	All annunciations are cancelled.
9.At the AFT LH ATTND Station:	In the handset:
lift the handset from the cradle.	a dial tone is heard.
	On the AFT LH AIP 320RH: the number symbol comes on.
10.On the handset:
push and hold the PTT and do an announcement.	the number symbol goes off,
	the message PA ALL comes on.
	On the FWD and the AFT RH AIPs 320RH:
	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and the FWD and AFT LH ATTND Stations:
	the announcement is heard from the loudspeakers.
11.At the AFT LH ATTND Station:
release the PTT and put the handset back to the cradle.	All annunciations are cancelled.
	On the AFT LH AIP 320RH:
lift the handset from the cradle.	the number symbol comes on.
	In the handset:
	a tone is heard.
12.On the handset:
push the PA ALL pushbutton switch.	the tone stops.
	On the AFT LH AIP 320RH:
	the number symbol goes off.
	the PA ALL message comes on.
	On the FWD and AFT RH AIPs 320RH:
	the PA ALL IN USE message comes on.
	In the cabin, all lavatories and the FWD attendant station:
push and hold the PTT pushbutton switch.
speak into the handset.	the announcement is heard from the loudspeakers.
	In the cockpit:
	the announcement is heard from the handset and the loudspeaker.
put the handset back to the cradle.	All annunciations are cancelled.
13.At the AFT RH attendant station:	In the handset:
lift the handset from the cradle.	a dial tone is heard.
	On the AFT RH AIP 320RH:
	the number symbol comes on.
14.On the handset:	On the AFT RH AIP 320RH:
push and hold the PTT and do an announcement.	the number symbol goes off,
	the message PA ALL comes on.
	On the FWD and the AFT LH AIPs 320RH:
	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and the FWD attendant station:
	the announcement is heard from the loudspeakers.
15.At the AFT RH ATTND Station:
release the PTT and put the handset back to the cradle.	All annunciations are cancelled.
	On the AFT RH AIP 320RH:
lift the handset from the cradle.	the number symbol comes on.
	In the handset:
	a tone is heard.
16.On the handset:
push the PA ALL pushbutton switch.	the tone stops.
	On the AFT RH AIP 320RH:
	the number symbol goes off.
	the PA ALL message comes on.
	On the FWD and AFT LH AIPs 320RH:
	the PA ALL IN USE message comes on.
	In the cabin, all lavatories and the FWD attendant station:
push and hold the PTT pushbutton switch.
speak into the handset.	the announcement is heard from the loudspeakers.
	In the cockpit:
	the announcement is heard from the handset and the loudspeaker.
17.At the AFT RH attendant station:
put the handset back to the cradle.	All annunciations are cancelled.
18.On the Capt audio selector panel:	On the Capt audio selector panel:
push to rest and turn the PA rotary knob fully ccw.	the PA rotary-knob integral light goes off.
19.On the main instrument panel 301VU:
turn the LOUDSPEAKER rotary knob ccw.

Subtask 23-73-00-710-065-X ** ON A/C NOT FOR ALL

C. Test of the PA Announcement from the Cabin

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
Turn the LOUDSPEAKER rotary knob fully clockwise.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
Push and turn the PA rotary-knob fully clockwise.	The integral light of the PA rotary-knob comes on.
3.At the forward attendant station:	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the forward AIP:
	The number symbol comes on.
4.On the handset:
Push and hold the PTT and make an announcement.	The number symbol goes off.
	The message DIRECT PA comes on.
	On the aft AIPs:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at the aft attendant stations:
	You hear the announcement.
5.At the forward attendant station:
Release the PTT and put the handset back into its cradle.	All indications go off.
	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the forward AIP:
	The number symbol comes on.
6.On the handset:
Push the PA ALL pushbutton switch.	The number symbol goes off.
	The message PA ALL comes on.
7.On the handset:	On the aft AIPs:
Push the PTT and make an announcement.	The message PA ALL IN USE comes on.
	In the cabin, in all lavatories and the aft attendant stations:
	You hear the announcement.
8.At the forward attendant station:
Put the handset back into its cradle.	All indications go off.
9.At the aft left attendant station:	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the aft left AIP:
	The number symbol comes on.
10.On the handset:
Push and hold the PTT and make an announcement.	The number symbol goes off.
	The message DIRECT PA comes on.
	On the forward and aft right AIPs:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at the forward attendant station:
	You hear the announcement.
11.At the aft left attendant station:
Release the PTT and put the handset back into its cradle.	All indications go off.
	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the aft left AIP:
	The number symbol comes on.
12.On the handset:
Push the PA ALL pushbutton switch.	The number symbol goes off.
	The message PA ALL comes on.
13.On the handset:	On the forward and aft right AIPs:
Push the PTT and make an announcement.	The message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at the forward attendant station:
	You hear the announcement.
14.At the aft left attendant station:
Put the handset back into its cradle.	All indications go off.
15.At the aft right attendant station:	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the aft right AIP:
	The number symbol comes on.
16.On the handset:
Push and hold the PTT and make an announcement.	The number symbol goes off.
	The message DIRECT PA comes on.
	On the forward and aft left AIPs:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at the forward attendant station:
	You hear the announcement.
17.At the aft right attendant station:
Release the PTT and put the handset back into its cradle.	All indications go off.
	In the handset:
Remove the handset from the cradle.	You hear a dial tone.
	On the aft right AIP:
	The number symbol comes on.
18.On the handset:
Push the PA ALL pushbutton switch.	The number symbol goes off.
	The message PA ALL comes on.
19.On the handset:	On the forward and aft left AIPs:
Push the PTT and make an announcement.	The message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at the forward attendant station:
	You hear the announcement.
20.At the aft right attendant station:
Put the handset back into its cradle.	All indications go off.
21.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
Push to reset and turn the PA rotary-knob fully counterclockwise.	The integral light of the PA rotary-knob goes off.
22.On the Main Instrument Panel 301VU:
Turn the LOUDSPEAKER rotary-knob fully counterclockwise.

Subtask 23-73-00-710-334-P ** ON A/C NOT FOR ALL

D. Do the test of the PA announcement from the cabin.

ACTION	RESULT
1.On the main instrument panel 301VU in the cockpit:
Turn the LOUDSPEAKER rotary knob fully cw.
2.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
3.At the forward attendant station:	On the forward left Attendant Indication Panel (AIP) 320RH:
Lift the handset from the cradle.	The number symbol flashes.
Push the PA ALL pushbutton.	The number symbol goes off.
	The message PA ALL comes on.
	On the aft AIPs 320RH/322RH:
Push and hold the PTT pushbutton.	The message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at the aft attendant stations:
Make an announcement.	You hear the announcement.
	On the aft AIPs 320RH/322RH:
Push to release the PTT pushbutton.	The message PA ALL IN USE goes off.
	In the cabin, in all lavatories and at aft the attendant stations:
	The announcement stops.
4.On the handset of the forward attendant station:	On the forward left AIP 320RH:
Push the RESET button.	The message PA ALL goes off. The message RST shows for approximately one second. The number symbol flashes.
5.At the forward attendant station:	On the forward left AIP 320RH:
Put the handset back into its cradle.	The number symbol goes off.
6.Repeat the steps 3 thru 5 for the handsets at all other attendant stations.	The indications of the AIPs and the announcements are the same as in steps 3 thru 5.
7.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
8.On the main instrument panel 301VU in the cockpit:
Turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-066-A ** ON A/C NOT FOR ALL

E. Do the priority test

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant station handset:
lift the handset from the cradle.	you hear a dial tone.

	On the forward LH Attendant Indication Panel (AIP) 320RH:
	'#' shows.

On the forward attendant station handset:
push the PA ALL pushbutton.	'#' goes off.
	'PA ALL' shows.

	On the aft AIPs:
	'PA ALL IN USE' shows.

	In the cabin, in all lavatories and at the aft attendant stations:
push and hold the PTT switch and make an announcment.	you hear the announcement.
2.In the cockpit:
lift the handset from the cradle.

On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear the announcement from the cockpit handset only.

	On the forward LH AIP:
	'WAIT PA ALL' shows.

	On the aft AIPs:
	'PA ALL IN USE' shows.
3.At the forward attendant station:	On the forward LH AIP:
release the PTT switch and put the handset back in the cradle.	'WAIT PA ALL' goes off.

	'PA ALL IN USE' shows.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
5.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	you hear the announcement from the cockpit hand microphone only.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
7.In the cockpit:	On all AIPs:
release the PTT switch put the hand microphone and the handset back in the cradle.	'PA ALL IN USE' goes off.

Subtask 23-73-00-710-066-Q ** ON A/C NOT FOR ALL

E. Do the priority test

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant-station handset:
lift the handset from the cradle.	you hear a dial tone.

	On the forward left attendant Indication Panel (AIP) 320RH:
	'#' shows.

On the forward attendant-station handset:
push the PA ALL pushbutton.	'#' goes off.
	'PA ALL' shows.

	On the aft AIPs:
	'PA ALL IN USE' shows.

	In the cabin, in all lavatories and at the aft attendant stations:
push and hold the PTT switch and make an announcement.	you hear the announcement.
2.In the cockpit:
lift the handset from the cradle.

On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear the announcement from the cockpit handset only.

	On the forward left AIP:
	'WAIT DIRECT PA' shows.

	On the aft AIPs:
	'DIRECT PA IN USE' shows.
3.At the forward attendant station:	On the forward left AIP:
release the PTT switch and put the handset back in the cradle.	'WAIT DIRECT PA' goes off.

	'DIRECT PA IN USE' shows.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
5.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	you hear the announcement from the cockpit hand microphone only.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
7.In the cockpit:	On all AIPs:
release the PTT switch put the hand microphone and the handset back in the cradle.	'DIRECT PA IN USE' goes off.

Subtask 23-73-00-710-335-A ** ON A/C NOT FOR ALL

F. Priority Test.

ACTION	RESULT
1.At the forward attendant station:	On forward left Attendant Indication Panel (AIP):
Lift the handset from the cradle.	The number symbol flashes.

On the handset at the forward attendant station:
Push and hold the PTT pushbutton switch.	The number symbol goes off.
	The message "> DIRECT PA" comes on.
	On aft AIPs:
	The message "DIRECT PA IN USE" comes on.
	In the cabin, in all lavatories and at the aft attendant stations:

Make an announcement.	You hear the announcement from the handset at the forward attendant station.
2.In the cockpit:
Lift the handset from the cradle.

On the handset in the cockpit:	Through the handset at the forward attendant station:
Push and hold the PTT pushbutton switch.	You hear the busy tone.
	On forward left AIP:
	The messages "WAIT DIRECT PA" and "DIRECT PA IN USE" comes on.

Make an announcement during the announcement from the forward attendant station.	You hear the announcement from the cockpit handset only.
3.At the forward attendant station:	On forward left AIP:
Release the PTT switch on the handset and put the handset back into its cradle.	The message "WAIT DIRECT PA" goes off.
	The message "DIRECT PA IN USE" comes on.
4.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push, release and turn the PA rotary knob fully clockwise.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
	Through the cockpit boomset:
	You hear the busy tone.
5.On the cockpit boomset in the cockpit:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement during the announcement from the cockpit handset.	You hear the announcement from the cockpit boomset only.
6.In the cockpit:
Release the PTT switch and put the handset back into its cradle.
7.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and release the PA pushbutton switch.	The integral light of the PA pushbutton switch goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On all AIPs:
	All indications goes off.

Push, release and turn the PA rotary knob fully counterclockwise.	The integral light of the PA rotary knob goes off.

Subtask 23-73-00-710-177-A ** ON A/C NOT FOR ALL

G. Do the test of the automatic high-volume announcement.

NOTE: On all emergency oxygen-containers, make sure that the doorstop is set to the test position.

NOTE: Do not hold the MASK MAN ON pushbutton switch for more than 30 sec., because the FAULT indication light in the TMR RESET pushbutton switch comes on after 30 sec.

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant station handset:
lift the handset from the cradle.	you hear a tone.
	On the forward LH Attendant Indication Panel (AIP) 320RH:
	one number symbol shows.
2.On the forward attendant station handset:
push the PA ALL pushbutton.	the number symbol goes off.
	the message PA ALL shows.
	On the aft AIPs:
	the message PA ALL IN USE shows.
	Through the forward attendant station handset:
	the tone stops.
	In the cabin:
push and hold the PTT and the PA ALL pushbutton at the same time.	you hear a tone. NOTE: Before you start the next step of the test, make sure that all emergency oxygen-container doorstops are in the test position.
3.In the cockpit, on the circuit breaker panel 49VU:
open the C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.
4.In the cockpit, on the overhead panel 21VU:	In the cabin:
lift the switch guard, push and release the MASK MAN ON pushbutton switch.	the doors of all emergency oxygen-containers (C/B 7WR related) open to the test position.
	In the cabin:
	you hear the tone with an increased volume.
5.In the cockpit, on the maintenance panel 50VU:
push and release the OXYGEN TMR RESET pushbutton switch.	you hear the tone with a decreased volume (normal level).
6.In the cockpit, on the circuit breaker panel 49VU:
open the C/B 2KS2.	you hear the tone with an increased volume.
close the C/B 2KS2.	you hear the tone with a decreased volume (normal level).
7.On the forward attendant station handset:	In the cabin:
release the PTT and the PA ALL pushbutton.	the tone stops.
8.At the forward attendant station:
put the handset back in the cradle.	All indications and annunciations are cancelled.
9.In the cockpit, on the circuit breaker panel 49VU:
close the C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

Subtask 23-73-00-710-177-H ** ON A/C NOT FOR ALL

G. Test of the Automatic High-Volume Announcement

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant-station handset:
Lift the handset from the cradle.	You hear a tone.
2.On the forward attendant-station handset:	In the cabin and at the aft attendant stations:
Push and hold the PTT pushbutton and make an announcement.	You hear the announcement. NOTE: You can ignore all CIDS-related indications in the cabin. NOTE: On all emergency oxygen-containers, make sure that the doorstop is set to the test position.
3.In the cockpit, on circuit breaker panel 49VU:
Open C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

In the cockpit, on overhead panel 21VU:
During the announcement from the forward attendant station, lift the switch guard and push the MASK MAN ON pushbutton switch. NOTE: Do not hold the MASK MAN ON pushbutton switch for more than 30 sec., because the FAULT indication light in the TMR RESET pushbutton switch comes on after 30 sec.	In the cabin:
	The doors of all emergency oxygen-containers (C/B 7WR related) open to the test position.

	In the cabin and at the aft attendant stations: You hear the announcement with an increased volume.
4.In the cockpit, on maintenance panel 50VU:
During the announcement from the forward attendant station, push the OXYGEN TMR RESET pushbutton switch.	You hear the announcement with a decreased volume (normal level).
5.In the cockpit, on circuit breaker panel 49VU:
During the announcement from the forward attendant station, open C/B 2KS2.	You hear the announcement with an increased volume.
During the announcement from the forward attendant station, close C/B 2KS2.	You hear the announcement with a decreased volume (normal level).
6.On the forward attendant-station handset:	In the cabin:
Release the PTT pushbutton.
Put the handset back in the cradle.	All indications and annunciations goes off.
7.In the cockpit, on circuit breaker panel 49VU:
Close C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

Subtask 23-73-00-710-178-A ** ON A/C NOT FOR ALL

H. Do the test of the automatic low-volume announcement at the FWD attendant station.

NOTE: You can ignore all CIDS related visual and acoustical indications in the cabin
that are not given here. They are not important for this test.

ACTION	RESULT
1.In the cabin:
close the cockpit door.
2.In the cockpit:
lift the handset from the cradle.
3.On the cockpit handset:	In the cabin, all lavatories and all attendant stations:
push and hold the PTT pushbutton switch to do an announcement.	the announcement is heard from the loudspeakers.
4.In the cabin:	At the forward attendant station:
open the cockpit door during the announcement from the cockpit handset.	the announcement volume decreases to a lower level.
5.In the cabin:	At the forward attendant station:
close the cockpit door during the announcement from the cockpit handset.	the announcement volume increases to a normal level.
6.In the cockpit:
put the handset back to the cradle.

Subtask 23-73-00-710-315-A ** ON A/C NOT FOR ALL

I. Do the test of the PA monitoring function in the cockpit

NOTE: You can ignore all CIDS-related indications in the cabin.

ACTION	RESULT
1.In the cockpit, on the main instrument panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push and turn the PA rotary knob fully cw.	the integral light of the PA rotary knob comes on.
3.In the cockpit:
lift the handset from the cradle.
4.At the forward attendant station:	Through the forward attendant-station handset:
lift the handset from the cradle.	you hear a dial tone.
5.On the forward attendant-station handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement.	you hear the announcement.

	In the cockpit:
	you hear the announcement.
6.At the forward attendant station:
release the PTT switch and put the handset back in the cradle.
7.In the cockpit:
put the handset back in the cradle.

Subtask 23-73-00-710-336-A ** ON A/C NOT FOR ALL

J. Test of the PA Monitoring Function in the Cockpit.

NOTE: You can ignore all CIDS-related indications in the cabin.

ACTION	RESULT
1.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully clockwise.
2.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push, release and turn the PA rotary knob fully clockwise.	The integral light of the PA rotary knob comes on.
3.In the cockpit:
Lift the handset from the cradle.
4.At the forward attendant station:	On the forward left AIP:
Lift the handset from the cradle.	The number symbol flashes.
5.On the handset at the forward attendant station:
Push and hold the PTT switch.	The number symbol goes off.
	The message "DIRECT PA" comes on.
	On the all aft AIPs:
	The message "DIRECT PA IN USE" comes on.

Make an announcement.	In the cabin, in all lavatories and at the aft attendant stations:
	You hear the announcement.
	In the cockpit:
	You hear the announcement through the loudspeaker and the cockpit boomset.
6.At the forward attendant station:	In the cabin, in all lavatories and at the aft attendant stations:
Release the PTT switch.	The announcement stops.
	In the cockpit:
	The announcement through the loudspeaker and the cockpit boomset stops.
	On the forward left AIP:
	The message "DIRECT PA" goes off.
	The number symbol flashes.
	On the all aft AIPs:
	The message "DIRECT PA IN USE" goes off.

Put the handset back into its cradle.	The number symbol goes off.
7.Repeat the steps 4 thru 6 for all other attendant stations.	The indications of the AIPs and the announcements are the same as in steps 4 thru 6.
8.In the cockpit:
Put the handset back into its cradle.
9.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:

Push, release and turn the PA rotary knob fully counterclockwise.	The integral light of the PA rotary knob goes off.
10.On main instrument panel 301VU in the cockpit:
Turn the LOUDSPEAKER rotary knob fully counterclockwise.

5. Close-up
Subtask 23-73-00-865-256-A ** ON A/C NOT FOR ALL

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41

Subtask 23-73-00-860-105-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Push the doors of the emergency oxygen containers to the closed position until they engage.
(2) On the emergency oxygen containers set the door stops to the normal position.
(3) Make sure that the circuit breakers 1WR, 2WR, 3WR and 7WR are closed.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)

[Rev.10 from 2021] 2026.04.01 06:17:56 UTC